Light fixture arm



FIG. 1 is a front elevation view of a light fixture arm in accordance with our design;

FIG. 2 is a top plan view of the light fixture arm in accordance with our design;

FIG. 3 is an enlarged front elevation view of the light fixture arm in accordance with our design;

FIG. 4 is an enlarged side elevation view of the light fixture arm in accordance with our design, the opposite side being a mirror image; and,

FIG. 5 is an enlarged back elevation view of the light fixture arm in accordance with our design.

The broken lines showing environmental structure are for illustrative purposes only and form no part of the claimed invention. 

The ornamental design for a light fixture arm, as shown and described. 